Here's a good How To, Make Your Own 45Kw DC Brushless Motor Construction - YouTube Videos and Info Pages. Check out the related videos too...

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45Kw DC Brushless motor construction

Video link...
https://www.youtube.com/watch?v=2LNfDI3QUpQ

Published on Nov 10, 2015

How to make a brushless motor step by step.
See also 3D modeling of the motor.
https://www.youtube.com/watch?v=0vjWm...
See my website with the winding calculations
http://www.masinaelectrica.com/45kw-b...
Designing a brushless motor from zero

Magnets: 40pcs 35UH
Slots: 48
Winding : AabBCcaABbcCAabBCcaABbcC
Nominal Voltage: 300v
Max amp: 150A
Weight: 17Kg
Speed: 2600rpm
Hall sensors: TLE4905 Infineon
Software : Autocad 3D Inventor 2015, FEMM 4.2, MotorCad 7
Usage: electric car, opel aglila